Gas burner



Oct. 5, 1948.

Filed June 4, 1945 E. H. MUELLER 2,450,483

GAS BURNER 2 Sheets-Sheet l INVENTOR. Era/m H. Mud/er Oct. 5, 194 8. H, MUELLER 2,450,483

GAS BURNER Filed June 4, 1945 2 Sheets-Sheet 2 FIG 5.

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IN VEN TOR. Err/r7 H, Mac/Aer Patented Oct. 5, 1948 UNITED aas BURNER Erwin H. Mueller, Grosse Pointe, Mich.

Application June 4, 1945, Serial No. 597,520

9 Claims. 1

This invention has to do with a burner for gaseous fuel. It is directed particularly to the provision of a gas burner especially useful for gas ranges or gas stoves although the burner structure may be employed in any sort of gas burning equipment.

It is the aim of the invention to provide an improved, eiiicient gas burner of the single duty type but which incorporates two burner heads. In accordance with the invention the burner is provided with a series of burner ports which may, and preferably do, form a complete circle from which gas issues for supporting the gas flames, this being the outer burner head. A second series of ports are provided within the circle or ring of ports above mentioned, this constituting the inner burner head. The gas supplied to both heads, however. is from a common means,

- the burner having but a single mixer tube for fuel.

Accordingly, while the burner has two separate burner heads they function simultaneously and the burner may be described as one of the single duty type.

Among the objects of the invention is the provision of an improved burner of the type alluded to which embodies a simplified construction that facilitates manufacture to the end that the burner may be made economically, supplied at a low cost, and yet a burner which is eflicient because of the double head construction. The burner presents a geometric form and type of construction which permits it to be used with burners of the double duty type. The burner is constructed primarily of two major portions, which are easily and simply assembled to each other and by reason of the particular construction of the portions the fuel supply is furnished'to the inner burner head.

Burner structures made in accordance with the invention are shown in the accompanying drawings and the invention and its objects and advantages may be better understood as these drawings are considered in conjunction with the accompanying detailed description.

Fig. 1 is a plan view of a burner constructed in accordance with the invention with some parts cut away.

Fig. 2 is a sectional view taken substantially on line 2-2 of Fig. 1 showing some of the interior structure.

Fig. 3 is a plan view of the under side of the cap portion of the burner taken substantially on line 3-3 of Fig. 2.

Fig. 4 is a plan view of the top part of the base or body of the burner.

Fig. 5 is an enlarged sectional view taken through the cap of the burner.

Fig. 6 is an enlarged sectional view showing a modified form of the stmcture.

Fig. '7 is an enlarged partial view showing a further modified form.

Fig. 8 is an underside view of a portion of the interior head embodying the structure shown in Fig. 6.

Fig. 9 is a sectional view illustrating a modified form.

Fig. 10 is a plan view of the cap of the modified form shown in Fig. 9.

With reference to Figs. 1, 2 and 4 it will be noted that the burner has a lower portion which may be called the burner body i and which is preferably formed integrally with a mixer tube 2 for conducting the fuel to the burner. As illustrated in Fig. 4, the top surface of the body is provided with a circumferential recess or channel 3 into which the hollow 4 of the mixer tube communicates. Surrounding the channel 3 is a wall having a surface 5. The central portion of the burner body embodies a cross member 1 while on each side of the cross member 1 is a passage 3 for the movement of secondary air therethrough. In the structure shown in Fig. 4 the cross member 1 is provided with a threaded aperture 9 while in the region of the surface 3 are two recesses 0. The preferred arrangement is that these surfaces 5 and 6 and the surface of the cross member I are all in the same plane and thus may be easily formed and machined with relatively simple operations.

The cap of the burner is generally illustrated at l5 and it advantageously is a die casting comprised of suitable metal such as a rust-resisting metal, such as a white metal alloy. The underside of the cap is formed with a circular recess or passage l8 defined on one side by a series of spaced projections i'l which form slots [8. Inside the channel it the cap is formed with faced raised portions 20 and 2i and a cross bar 22. A channel 23 is formed in the cross bar and it connects to the recess or channel l8 at opposite ends. The center part of the cross bar is enlarged as at 21 to form the inner burner head (Fig. 5). A plurality of alternate ridges and slots are formed in the top surface of the enlarged portion 23 as illustrated at 25 and 26 in Fig. 5, these forming gas outlet ports. The enlarged portion has a central aperture therethrough as at 21. The passage 23 is defined by wall portions 28 and on each side of the cross bar the cap is providedwith openings 29. The cap is also provided with projecting 3 studs or pins 38. It will be noted that the recess or channel i8 is undercut to a depth greater than the depth of the ports l8. This channel provides extra internal area to the burner ports and provides sort of a reservoir. Accordingly, the volume of gas in the channel has an opportunity to quiet down from any turbulence thus minimizing the tendency of pulsations through the ports and pulsations in the gas flame. The formation of the channel thus provides for a reservoir or body of gas above the ports.

When the body and cap are assembled, the projections l1 seat upon the surface and the surface and the surface of the walls 28 seat upon the surface 8 and portions of the surface of the cross member 1. To obtain accurate location of the parts the studs fit into the recesses 9. Also, the openings 29 in the cap align with the openings 8 in the body to form through passageways in the burner as shown in Fig. 1. The gas entering through the passage 4 passes into the annular passage l8 and flows out through the ports i8 for supporting the gas flame.

The channel 23 is closed by the body of the burner and by the walls 22 of the cap so that the gas which flows into the channel passes out through the ports 28 for supporting an inner gas flame. Where, as preferred, the surfaces 5 and 8 of the burner and the surface of the cross member are all in a single plane, the underside of the cap, including the projections l1 and the surfaces of walls 2|], 2| and 22 are all in a common plane.

It will be noted that the channel "5 has its top portion disposed considerably above the outlet ports i8. This forms a sort of reservoir for the gaseous fuel and promotes a nicety of flame con- 'trol particularly in action of starting or terminating the flow of gaseous fuel. It is noticeable particularly at the commencement of the supply of gas to the burner in this, that if the burner is initially ignited at one or more of the ports [8 the ignition "chains around the periphery of the burner in an exceedingly short period of time. And in this connection, it might be said, that any suitable form of ignition may be used with the burner. It is important to note also that the inner burner ports extend in an outward direction; that is to say, the ports open outwardly and, therefore, the flames of the burning gas extend outwardly. A reservoir structure is also present adjacent the ports 28.

To hold the parts in assembly a screw threaded member is secured in the threaded aperture 9 and a closure member 38 is screw threaded onto the member 35 and it searts upon the top surfaces of the projections 25. This closes the central opening 21 except for leaving the ports 28 open. The cap may have a slot formation 31 for the reception of a tool or a coin for turning it. The holding member 35 may be relatively permanently fixed either to the body or to the closure member with the opposite end being the one which is removable.

Thus, a simplified and emclent burner structure is provided which is of the double head single duty type. The number of parts are minimized, the overall structure is simplified and a single part which functions as a portion of the inner head holds all the parts in assembly. The modified form shown in Figs. 6 and 8 is of the same construction and like reference characters are applied to like parts. In this form, however, the upper surface 48 of the central enlarged parts 24 is of smooth formation and the ports I for the issuance of flame supporting gas are formed in the cap "a.

In the form shown in Fig. '7 the cap 28b has ports 42 drilled or otherwise formed therein in place of the slot construction and the dividing line between the closure piece and the enlarged central portion 24 of the cap is shown at 43. Also, in this form, a variation is shown wherein the screw member 28a passes up through the cross lgegnber I of the body and into the closure piece In Figs. 9 and 10 a form of the invention is illustrated in which the cap does not have to be located with precision as regards the burner body. The body illustrated is of usual construction pro-- vided with an annular chamber into which fuel is led by a mixer tube 5|. The body has a cross bar 52 which, as shown, has an upstanding screw threaded stud 82. The top of the body is provided with surfaces 54 and 88 which extend peripherally around and inside the annular chamber 50.

The top or cap may be a one piece die casting with an annular body 81 designed to rest upon the surfaces 54' and 55. The outer edge of the cap is formed with slots or grooves which provide gas ports 58 when the projections defining the grooves seat upon the surface 54. The cap has an inner annular surface 59 which seats upon the surface to close the chamber 50. The cap is recessed internally as at 80, which forms the top wall of the circumferential chamber 50 and it is recessed above the ports 88 as shown at 8|. This forms sort of a gas chamber or reservoir.

The cap is provided with a transverse bar or cross piece 8| which is enlarged in its intermediate portion to provide a chamber 88. This cross bar is provided with passages 88 and 81 which connect the chamber 85 with an annular chamber 50. These passages may be drilled. The drill may be passed through the outer portion of the cap and the holes may be plugged as at 88. The top surface of the wall surrounding the chamber 55 is angularly disposed and provided with alternating recesses 10 and projections Ii and a cap screw 12 fits over the projections to provide outwardly extending ports for the issuance of flame supporting gas. The cap screw has a threaded stem 13 which is threaded in a depressed part 14 of the cross piece. This depressed portion of the cross piece is screw threaded for attachment to the stud 53.

With this arrangement it will be noted that the cap may be screwed in position and that it may come to rest in any particular rotary position as it is not necessary to line up the cross bar with any other part of the burner body since the passages 68 and 61 function in any particular position. The burner cap may be easily removed and be replaced for any reason and access to the inner chamber can be had by merely removing the cap screw.

I claim:

1. A gas burner comprising, a body member, a cap member, the body member haing a channel defined by inner and outer annular walls, a cross member extending across the space within the inner wall, the tops of the walls and the cross member presenting contact surfaces, the cap member having a channel defined by inner and outer annular walls, a cross member extending across the space within the inner wall, one of the cross members having a passage therein leading into the central portion of its cross member and which passage is defined on opposite sides by walls, the tops of the walls of the cap member presenting contact surfaces, the cap being inverted and disposed on the body member with the said surfaces of the walls contacting so that the channels align and form a passage for gaseous fuel and so that the passage in the cross member of the cap member is closed for conducting gaseous fuel, outlet ports in one of the outer walls for the issuance of flame supporting gas and outlet ports in the center portion of the cap cross member for the issuance of flame supporting gas.

2. A gas burner comprising, a body member, a cap member, the body member having a channel defined by inner and outer annular walls, a cross member extending across the space within the inner wall, the tops of the walls and the cross member presenting contact surfaces, the cap member having a channel defined by inner and outer annular walls, a cross member extending across the space Within the inner wall, one of the cross members having a passage therein leading into the central portion of its cross member and which passage is defined on opposite sides by walls, the tops of the walls of the cap member presenting contact surfaces, the cap being inverted and disposed on the body member withv the said surfaces of the walls contacting so that the channels align and form a passage for gaseous fuel and so that the passage in the cross member of the cap member is closed for conducting gaseous fuel, the outer wall on the cap having a plurality of slots formed therein which are closed by the outer wall of the body to provide ports for the issuance of flame supporting gas, and outlet ports in a central portion of the cap cross member for the issuance of fiame supporting gas.

3. A gas burner comprising, a body member, a cap member, the body member having a channel defined .by inner and outer annular walls, a cross member extending across the space within the inner wall, the tops of the Walls and the cross member presenting contact surfaces, the cap member having a channel defined by inner and outer annular walls, a cross member extending across the space within the inner wall, one of the cross members having a passage therein leading into the central portion of its cross member and which passage is defined on opposite sides by walls, the tops of the walls of the cap member presenting contact surfaces, the cap being inverted and disposed on the body member with the said surfaces of the walls contacting so that the channels align and form a passage for gaseous fuel and so that the passage in the cross member of the cap member is closed for conducting gaseou's fuel, the outer wall on the cap having a plurality of slots formed therein which are closed by the outer wall of the body to provide ports for the issuance of flame supportingv gas, the center portion of the cross member on the cap member having an aperture therein, a closure piece positioned over the aperture and secured to the body member for holding the body member and cap member in assembly, and ports for the issuance of flame supporting gas formed by the central portion of the cap member and the closure piece.

4. A gas burner comprising, a body member, a cap member, both members having an outer annular wall and an inner annular wall defining channels therebetween, the body member having a cross piece enlarged in its central portion and the body member having an opening on each abutment with each other so that the channels form a gas passageway and so that the passage in the cross piece of the cap member is closed, the outer annular wall of the cap member having substantially radially extending slots therein which are closed by the outer annular wall of the body member to provide outwardly opening ports for the issuance of fiame supporting gas, a closure piece fitting over the central part of the cross member of the cap and detachably secured to the body member, the closure piece and the central part of the cross member of the cap defining outwardly opening ports for the issuance of flame supporting gas.

5. A gas burner comprising, a body member, a cap member, both members having an outer annular wall and an inner annular wall defining channels therebetween, the body member having a cross piece enlarged in its central portion and the body member having an opennig on each side of the cross piece, the cap member having a cross piece enlarged in its central portion, the cross piece in the cap member having a channel therein, the central part of the cross piece in the cap member being enlarged and the cap member having openings on the opposite sides of the cross piece, the cap member being inverted and disposed on the body member with the walls in abutment with each other so that the channels form a gas passageway and o that the passage in the cross piece of the cap member is closed, the outer annular wall of the cap member having substantially radially extending slots therein which are closed by the outer annular wall of the body member to provide outwardly opening ports for the issuance of flame supporting gas, a closure piece detachably connected to the body member and positioned over the aperture in the central part of the cross piece in the cap mem ber and cooperating-with the central portion of the cap member to define outwardly opening ports for the issuance of flame supporting gas.

6. A gas burner comprising, a body member and a cap member, the cap member being inverted and disposed on the body member, the two members having outer and inner annular walls sage leading to the central portion of the burner,

the central portion of the cap member having an aperture, a closure piece fitting over the aperture and detachably connected to the body member, the outer annular wall of the cap member being comprised of alternate recesses and projections which form outwardly opening ports for the issuance of fiame supporting gas, the closure piece and the central part of the cap member cooperating to define outwardly opening ports for the issuance of fiame supporting gas.

7. A gas burner comprising, a body having an annular channel defined by inner and outer walls and to which gas fuel is to be supplied, the inner and outer walls having top contact surfaces, a cap member of annular form, said cap member being annularly recessed and having inner and outer walls defining the recess adapted to rest upon the surfaces of the burner, the outer wall v of the cap having alternate projections and rein the cross piece, the surfaces of the closure piece and of the walls surrounding the chamber in the cross piece cooperating to form outwardly extending ports for the issuance of flame supporting 8. A gas burner comprising, a body having an annular channel defined by inner and outer walls and to which gas fuel is to be supplied, the inner and outer walls having top contact surfaces, a cap member of annular form, said cap member being annularly recessed and having inner and outer walls defining the recess and adapted to rest upon the surfaces of the burner, the outer wall of the cap having alternate projections and recesses which, when resting on the outer contact surface, provide outwardly directed ports for the issuance of flame supporting gas, the inner wall of the cap forming a substantially sealed joint with the inner surface of the body, the cap having a cross piece, said cross piece having a chamber in substantially its middle portion, passageways deflned by the cross piece connecting the annular chamber with the chamber in .the cross piece, means for securing the cap to the burner body, and a closure piece secured to the cap member and overlying the chamber in the cross piece, the 'walls'surrounding the chamber in the cross piece having slots therein which are covered by the closure piece to form outwardly directed ports for the issuance of flame supporting gas.

9. A gas burner comprising, a body having anannular channel defined by inner and outer walls and'towhich gas fuel is to be supplied, the inner and outer walls having top contact surfaces, 9. cap member of annular form. said cap member being annularly recessed and having inner and outer walls defining the recess and adapted to rest upon the surfaces of the burner, the outer wall of the cap having alternate projections and recesses which, when resting on the outer contact surface, provide outwardly directed ports for the issuance of flame supporting gas, the inner wall of the cap forming a substantially sealed joint with the inner surface of the body, a cross piece on -the cap member, said cross piece having a chamber in its middle portion, said cross piece having a closed gas passage therein connecting the chamber in the cross piece andthe said annular chamber, a closure piece secured to the cap member and overlying the chamber in the cross piece, the closure piece and the wall surrounding the chamber in the cross piece being in contacting relationship, and some of the walls having slots therein which provide outwardly directed ports for the issuance of flame supporting gas.

ERVIN H. MUELLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

